# -*- coding: utf-8 -*-#
#-------------------------------------------------------------------------------
# 建立者:        潘炎珍  
# Name:         demo13
# Description:
# Author:       98745
# Date:         2019/3/11
#-------------------------------------------------------------------------------

from numpy import *
d,l=loadtxt('data1.csv',delimiter=',',usecols=(4,5),unpack=True)
print('d','=',max(d))
print('l','=',min(l))
print('范围','=',max(d)-min(d))
print('范围','=',ptp(d))